13687571940 has 48 divisors (see below), whose sum is σ = 43800231552. Its totient is φ = 3128587776.

The previous prime is 13687571903. The next prime is 13687571941. The reversal of 13687571940 is 4917578631.

It is a happy number.

It is a super-2 number, since 2×13687571940² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13687571941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16294309 + ... + 16295148.

It is an arithmetic number, because the mean of its divisors is an integer number (912504824).

Almost surely, 2^13687571940 is an apocalyptic number.

13687571940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13687571940 is an abundant number, since it is smaller than the sum of its proper divisors (30112659612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13687571940 is a wasteful number, since it uses less digits than its factorization.

13687571940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32589476 (or 32589474 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 13687571940 in words is "thirteen billion, six hundred eighty-seven million, five hundred seventy-one thousand, nine hundred forty".